Modelling the Low Impact Development Alternatives for Rainfall Runoff Reduction

In order to control storm water overland runoff, which in turn regulates flood volume and flow rate, one of the surface runoff mitigation and treatment approaches is Stormwater Best Management Practice (BMP). Sustainable drainage systems (LID) are widely recommended and used in many parts of the world. In the United States and Canada, LID is called Low Impact Development (LID), which is an approach that encourages the interaction of natural processes with the urban environment to keep and rebuild ecosystems for water management. LID can be used to manage stormwater runoff at the property level. In this study four different elements in LID were studied for their efficiency in reducing runoff that include permeable pavement (PP), infiltration trenches (IT), bioretention cells (BC), and rainwater barrel (RB) storage. Hydrological performance of these LID practises in the storm water network were performed using PCSWMM which is considered one of the most promising hydrological models.